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Maximum power transfer theorem – maximum power is transferred to a load. Example – What value of RL is required to receive maximum power from the.
The load size always affects the amount of power transferred from the supply source, i.e., any change in the load resistance results to change in power transfer to the load. Thus, the maximum power transfer theorem ensures the condition to transfer the maximum power to the load. Note that the power delivered is zero when the load resistance is zero as there is no voltage drop across the load during this condition. Also, the power will be maximum, when the load resistance is equal to the internal resistance of the circuit (or Thevenin’s equivalent resistance).
Again, the power is zero as the load resistance reaches to infinity as there is no current flow through the load.Power Transfer EfficiencyWe must remember that this theorem results maximum power transfer but not a maximum efficiency.